Category Archives: network

the dark

My home network is not so afraid of the dark… I have no guarantee of absolute protection from zero-day threats, but no one does. We can only do our best to keep up with current anti-virus and firewall rules, but … Continue reading

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How to setup FCoE on Dell R710 Servers with X520 card using the Nexus 1000v

FCoE works well enough if you are deploying on a UCS or other blade server that is officially supported.  However it can get a bit interesting trying to get it to work on a general purpose server.  Here is my … Continue reading

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Nexus VRF route confusion

Here is something that confuses more than a couple people on the Nexus platform. You might think that because the IOS/XE command to create a default route in your management VRF is: ip route  vrf management 0.0.0.0 0.0.0.0 192.168.1.1 That … Continue reading

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FCoE and FP ?

I had a little trouble tracking down the answer to what I thought was a simple question so I thought I would post it for anyone “googling” The question was “Does FCoE work with fabric path?”  Specifically my question was … Continue reading

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PIM BiDir Bidirectional Wireshark dissectors

Bidirectional Protocol Independent Multicast RFC 5015 (  http://www.ietf.org/rfc/rfc5015.txt ) is in my opinion the most bulletproof multicast routing protocol around, but it doesn’t have a huge install base.  Consequently, the PIM dissector in even the latest wireshark as of this … Continue reading

Posted in internet, network | 4 Comments

I’ve been workin . . .

I scribbled this out some time back, in the mid-90s as I was pulling arrows out of my backside – learning how to manage an internet service. I only recently found where I had later saved it in a text … Continue reading

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Multicast to Unicast and Vice Versa

Conversion from multicast to unicast, unicast to multicast and between multicast group addresses using a Cisco router Continue reading

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sendmail delivery to alternate port

Slightly dated, but still a very useful sendmail hack. My cable modem provider blocks not only outbound port 25 to anyone other than their own mail server, but they block inbound port 25 (as tho I am not responsible enough … Continue reading

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Make clear line easier to use on your cisco router terminal server

change privilege level on cisco router commands Continue reading

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